What former players say

Best of friends

Ibrahimovic had earlier said he had "many options" for next season, including a return to Italy - but the lure of working with Mourinho has proved too strong.

He played under the 53-year-old Portuguese at Inter in 2008-09, helping them win the Serie A title, before joining Barcelona.

In his book I Am Zlatan Ibrahimovic, he described Mourinho as a manager he was "willing to die for".

Speaking recently on Mourinho's appointment at United, he said: "He is the man to bring them back to the top. I had a fantastic time working with him."

Worst of enemies

However, Ibrahimovic is not so complimentary of the new Manchester City boss Pep Guardiola, whom he played under for two seasons at Barcelona.

He referred to the Spaniard as a "spineless coward" in his autobiography, and Barcelona president Josep Maria Bartomeu revealed Ibrahimovic said he "might punch Pep" during his time at the Nou Camp.

Marketable asset

Football finance expert Rob Wilson, of Sheffield Hallam University, says Ibrahimovic would be United's most marketable player since Cristiano Ronaldo, estimating that shirt sales alone will top £50m, enough to cover the cost of failing to qualify for this season's Champions League.

"Zlatan has a global profile and global appeal," Wilson said. "Fans will buy shirts with Ibrahimovic on the back in Africa and South East Asia, markets where United had a foothold in but not the leverage. Only a few select few players can do that: Gareth Bale, Neymar, Lionel Messi and Ronaldo."

The ego has landed

Ibrahimovic has an ego to match his footballing talents and is renowned for some outrageous statements, which might - or might not - be tongue in cheek.

When Arsene Wenger wanted Ibrahimovic to trial for Arsenal in 2000, the then teenager joined Ajax instead, insisting: "Zlatan doesn't do auditions."

After Sweden missed out on the World Cup finals in 2014, he said: "One thing is for sure, a World Cup without me is nothing to watch."

Analysis

BBC Sport's Simon Stone:

The imminent arrival of Ibrahimovic looks to be perfect for Manchester United.

Their history is littered with temperamental big-name players: George Best, Eric Cantona and Cristiano Ronaldo to name but three.

The big question is whether, at 34, the striker can adapt to the physical demands of the Premier League.

Delve into the past of this contradictory forward and it seems he is at his best when questions are at their fiercest.

But, as every stockbroker will tell you, past performance is no guarantee of what will happen in the future.